How to reinstall Win 7 without losing license?

Question

Windows

Good afternoon.
Can anyone orient, a computer was purchased with Win 7x64 (OEM license - non-exclusive rights ...). After a couple of inclusions, the updates were unsuccessfully installed, and now at boot, even in safe mode, it hangs on the rollback of updates and that's it. I want to reinstall the operating system - how to do it, keeping the license?
Also on the computer there is an activated office - home and buisness - what will happen to the license for it after trying to re-activate it on a new system?
UPD. I found a sticker on the bottom of the case, the office is tied to the live.com account and it seems like it will work after reinstallation. While Windows booted from the 5th attempt, I turned off the updates in Fig. Thanks to those who responded)

Answer 1

It's simple, you must have the keys / stickers. If they don't, then you don't have a license.
If there is just a sticker without a key, then it is sewn into the BIOS, Windows will activate itself.